REV'IT! Challenger Cooling Vest Insert Once saturated with water the Challenger vests natural cooling properties are activated simply by opening your jackets ventilation features and exposing the charged vest to passing airflow. Once activated, the Challenger cooling vest helps riders maintain a comfortable body temperature and, ultimately, stay in better control. The Challenger can be zipped directly into select REVIT! jackets for a clean, integrated fiteffectively amplifying a jackets existing airflow for up to six hours. FEATURES Outer Shell PWR Stretch mesh, 4-way 3D stretch mesh Lining PU coated ribstop Insulation HyperKewl Polymer Embedded super absorption cooling fabric Composition 42 nylon, 11 elastane, 25 polyester, 22 viscose ERGONOMIC FEATURES Fit Tour fit Waterproofing Highly breathable Features Stretchable side- and shoulder panels Note Vest does not connect to all REV'IT! Jackets, please read jacket description carefully, or let us know if you have questions.